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Cr4+: YAG chirped-pulse oscillator

Sorokin, Evgeni; Kalashnikov, Valdimir L; Mandon, Julien; Guelachvili, Guy; Picque, Nathalie; Sorokina, Irina T
Journal article, Peer reviewed
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URI
http://hdl.handle.net/11250/2356258
Date
2008
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Original version
New Journal of Physics 2008, 10   10.1088/1367-2630/10/8/083022
Abstract
We demonstrate chirped-pulse operation of a Cr :YAG passively

mode-locked laser. Different operation regimes of the laser are extensively

investigated in the vicinity of zero dispersion both experimentally and

numerically. It is shown that for a given laser configuration, transition to the

positive dispersion regime allows a 5-fold increase in the output pulse energy,

which is otherwise limited by the onset of the multipulsing or ‘chaotic’ modelocking.

The output pulses have 1.4 ps duration and are compressible down to

120 fs in a 3m piece of silica fiber, enabling supercontinuum generation in a

nonlinear fiber. The spectrum shape and operation stability of the chirped-pulse

regime depend strongly on the amount and shape of the intracavity dispersion.

The numerical model predicts the existence of the minimum amount of the

positive dispersion, above which the chirped-pulse regime can be realized. Once

located, the chirped-pulse regime can be reliably reproduced and is sufficiently

stable for applications.
Publisher
IOP Publishing
Journal
New Journal of Physics

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